Wolong Reservoir

Overview

Wolong Reservoir lies in Lishui District and is one of the district's six medium-sized reservoirs (district government natural resources page; Jiangsu Water Resources, 2022 no. 5). Its class is medium: the Nanjing Municipal Water Resources Bureau's 2022 list of the "four responsible persons" for reservoirs gives Wolong Reservoir's scale as medium, its township as the Economic Development Zone, and its management unit as the Wolong Reservoir Management Office. That column is the allocation of flood-control responsibility in 2022, and Wolong Reservoir is entered under the Economic Development Zone rather than a subdistrict; the Lishui Economic Development Zone and Zhetang Subdistrict share one office, and this entry's district_towns accordingly records Zhetang Subdistrict, as explained under Open questions.

Names: the district government's natural resources page writes Wolongshan Reservoir in its list of medium-sized reservoirs, while the municipal water bureau's 2022 list, the register of the Nanjing Municipal Planning and Natural Resources Bureau and the Measures for the Management and Protection of Water Conservancy Works in Lishui District all use Wolong Reservoir. This entry takes the water bureau form Wolong Reservoir and sets the form Wolongshan Reservoir out under Open questions.

Capacity: total capacity 1339 10,000 m³, usable capacity 756 10,000 m³ and usable water level 18.5 m (Jiangsu Water Resources, 2022 no. 5, Table 2). This entry's capacity_10k_m3 takes the total capacity of 1339 10,000 m³. No second figure for the total capacity has been found on this site, nor any figure for the flood-control or dead capacity.

Area: the Natural Resource Register of the Nanjing Municipal Planning and Natural Resources Bureau, entered on 14 June 2024, records in the water-flow table of the registered unit Wolong Reservoir a water surface of 212.76 ha for "reservoir surface — Wolong Reservoir", covering four parcels; the water-flow row of the same register's natural conditions table gives 214.64 ha, covering two river parcels of 1.88 ha. This entry's area_km2 takes the water surface of 212.76 ha, that is 2.1276 sq km; the two rows have different meanings, see Open questions.

Registered unit and boundaries: registered unit number 320117333000001, unit type "reservoir surface", situated in Lishui District, Nanjing, Jiangsu. Its boundaries are an existing road to the east, the Changshen Expressway to the south, an existing road to the west and the Ergan River to the north. The registered unit covers 274.38 ha in all, of which 259.84 ha is state-owned, 5.60 ha collectively owned and 0.00 ha disputed; the natural resources within the unit total 240.51 ha, namely 214.64 ha of water flow, 11.53 ha of wetland, 12.28 ha of forest and 2.06 ha of grassland, with a further 24.93 ha of non-natural-resource land such as cultivated land and built-up land.

Basin recorded as the Qinhuai: the northern boundary of the register's four boundaries is the Ergan River, and Article 5(2) of the Measures for the Management and Protection of Water Conservancy Works in Lishui District records that the dam-protection area of Wolong Reservoir runs "north to the Ergan River and the channel leading to Jiabian village"; the Ergan River is a Qinhuai tributary, hence the Qinhuai. No official document directly stating Wolong Reservoir's basin has been found on this site.

Other names and titles: the Yongyang Subdistrict profile page lists Wolong Lake alongside Zhongshan Lake and Yaojia Reservoir as the subdistrict's "three water source protection areas"; the Lishui District Water Development 13th Five-Year Plan records four provincial water conservancy scenic areas in the district, of which Wolong Reservoir is one. That plan gives no year or document number of approval, and this entry therefore leaves designation empty. Whether Wolong Lake and Wolong Reservoir are the same water body is stated by neither source.

Formation and change

Relation to the river: the northern boundary of the register's four boundaries is the Ergan River, which fixes the spatial relation between Wolong Reservoir and the Ergan River, but a boundary description is not the same as "the reservoir stands on the Ergan River". The Ergan River is a tributary of the Lishui River, 25.60 km in all, running west-north-west from Dongping across Dongping, Qunli, Wushan and Zhetang to enter the Qinhuai at Wucha Bridge (environmental impact report form for the Dongping Subdistrict 2019 improvement works for water bodies not meeting the standard, January 2020).

Works management: Wolong Reservoir is under district management. Article 3 of the Measures for the Management and Protection of Water Conservancy Works in Lishui District lists seven district-managed reservoir management offices, including the Wolong Reservoir Management Office; Article 5(2)5 gives its dam-protection area beyond the toe of the landward slope of the dam as "north to the Ergan River and the channel leading to Jiabian village, east to 200 m above Nanshan Sluice, west to 200 m west of the main canal"; Article 19(1) records that its maintenance funds are budgeted by the district finance bureau. A cross-check flood level of 20.15 m (Wusong datum) is given in the district water bureau's and Jingqiao Town government's reply to suggestion no. 038 of the district people's congress, quoting that instrument. In 2019 the Wolong Reservoir Management Office passed the Jiangsu Provincial Department of Water Resources' review as a provincial class I water engineering management unit (Jiangsu Provincial Department of Water Resources, 9 January 2019).

Ecological restoration and improvement: the plan records that during the Twelfth Five-Year period ecological restoration works were carried out on the inflow channels of Wolong and Yaojia reservoirs; the 13th Five-Year tasks include comprehensive water-environment improvement, water-quality monitoring and ecological wetland restoration on the inflow channels of the four medium-sized reservoirs Laoyaba, Yaojia, Zheshantou and Wolong. Both come from the Lishui District Water Development 13th Five-Year Plan, the latter being a plan-task statement and not written here as completed. The same plan records that during the Twelfth Five-Year period the reinforcement of six medium-sized reservoirs in the district, including Zhongshan and Fangbian, was completed; that is a district-wide total, with no year or content given for each.

Drinking water: Wolong Reservoir is the only one of the six medium-sized reservoirs not on the drinking water source area list (Jiangsu Water Resources, 2022 no. 5; the drinking water function area list in the Lishui District Water Development 13th Five-Year Plan includes Fangbian, Zhongshan, Laoyaba, Yaojia and Zheshantou but not Wolong). The Lishui District Finance Bureau's 2020 ecological space protection area table and the 2025 draft plan for evaluating and optimising ecological space control areas likewise do not include Wolong Reservoir.

No first-tier source has been found for the year Wolong Reservoir was built or for a reservoir-by-reservoir list of reinforcement works, so nothing is written here.

Landscape and visiting

Water conservancy scenic area: the Lishui District Water Development 13th Five-Year Plan lists Wolong Reservoir as one of the district's four provincial water conservancy scenic areas, and that is the source found here for the scenic status; the plan gives no year or document number of approval, nor the scenic area's extent or opening information, and this entry records it as it stands without adding a year.

Visiting leads: among the seven fine holiday routes for beautiful villages listed in the Lishui District Culture and Tourism Bureau's 2025 reply, one is "a convalescent route centred on Liangpengxia and Wolong Lake town". The reply gives only the route's name and core attractions, not its ends, length or intermediate points, and it is a working reply rather than a formal route list, so this site does not write it as an official route; the relation between Wolong Lake town and the reservoir is not stated by the source.

Water quality statistics: Jiangsu Water Resources, 2022 no. 5, takes the six medium-sized reservoirs of Lishui District as its subject and gives monthly water quality statistics for Wolong Reservoir from 2011 to 2021, assessed on total phosphorus and total nitrogen: class II 11.5%, class III 45.4%, class IV 36.9%, and class V and worse 6.2%, the last occurring in 2011, 2013, 2014 and 2015. Those proportions are ratios from monthly statistics for 2011 to 2021, not a water quality conclusion for any one year; the paper also assesses the eutrophication trend, and this site records only the subject of the study and the period of its statistics without restating evaluative judgements.

Visiting information: no first-tier source has been found for public visiting, a lakeside footpath, viewing facilities or tickets at Wolong Reservoir, and visiting information should follow the official notices of the district water department, the district culture and tourism department and the local subdistrict. Opening information is current to September 2026.

Open questions

• Two spellings of the name: the district government's natural resources page writes Wolongshan Reservoir, while the municipal water bureau's 2022 list, the municipal planning and natural resources bureau's register and the Measures for the Management and Protection of Water Conservancy Works in Lishui District all use Wolong Reservoir. This entry takes Wolong Reservoir and sets Wolongshan Reservoir beside it without choosing.
• Wolong Lake and Wolong Reservoir: the Yongyang Subdistrict profile page has the name Wolong Lake, while the provincial water conservancy scenic area list uses Wolong Reservoir, and whether the two are exactly one water body is not stated by any source. That subdistrict page lists Zhongshan Lake, Yaojia Reservoir and Wolong Lake as the subdistrict's "three water source protection areas", which is promotional wording, and since flood-control responsibility for Yaojia Reservoir belongs to Jingqiao Town and for Wolong Reservoir to the Economic Development Zone, the three do not all lie within Yongyang Subdistrict; this site does not use that page to write their towns.
• Township: the municipal water bureau's 2022 list enters the Economic Development Zone in its township column, which is the 2022 allocation of flood-control responsibility rather than a subdistrict; this entry's district_towns records Zhetang Subdistrict on the street-and-town site's basis (the Lishui Economic Development Zone and Zhetang Subdistrict share one office), pending a second source.
• Two area rows: the register's water-flow table "reservoir surface — Wolong Reservoir" 212.76 ha and the natural conditions table's water-flow row 214.64 ha are two fields, the latter covering two river parcels of 1.88 ha; this entry's area_km2 takes the former, and any citation must state which row is meant rather than calling both "water surface". The registered area is the water-flow range on the confirmed registration basis and is not the same statistical range as the reservoir's designed water surface.
• Catchment: only Jiangsu Water Resources, 2022 no. 5, Table 2, gives a catchment of 59.03 sq km for Wolong Reservoir; the four reservoirs' catchment figures in that table are very close to one another and cannot be reconciled with the 303.54 sq km total catchment of the county's 79 reservoirs in the Lishui County Eleventh Five-Year Water Plan, and no second source has been found, so this site does not adopt the figure on its own.
• Only one source for the capacity: the total capacity of 1339 10,000 m³ and usable capacity of 756 10,000 m³ in Jiangsu Water Resources, 2022 no. 5, Table 2, have no equivalent figure from the water authority on this site; the table gives only total and usable capacity, which are not the same set as the flood-control and dead capacities of Fangbian and Zhongshan in the district people's congress reply, and the two may not stand in for one another.
• No direct source for the basin: this entry's basin records the Qinhuai, on the ground that the northern boundary of the register's four boundaries is the Ergan River and that the Ergan River is a Qinhuai tributary; no official document directly stating Wolong Reservoir's basin has been found on this site.
• Year of construction: neither the register nor the paper in Jiangsu Water Resources gives a year of construction, and no year of construction or document number of class approval for Wolong Reservoir has been found, so none is written.
• Provincial water conservancy scenic area: the Lishui District Water Development 13th Five-Year Plan gives the list only, with no year or document number of approval, and this entry therefore leaves designation empty.
• The cross-check flood level of 20.15 m (Wusong datum) reaches us through the district water bureau's and Jingqiao Town government's reply to suggestion no. 038 of the district people's congress, quoting the Measures for the Management and Protection of Water Conservancy Works in Lishui District; that reply has Zheshantou Reservoir as its subject, so any citation must state that it is the reply's quotation of the instrument and must mark it separately from Zheshantou Reservoir's Qingdao datum level.